Enhanced Sensing Performance of Au-decorated Cellulose Nanofiber-SnO2 for NO2 Detection Under UV Light

Cellulose nanofiber (CNF), a natural polymer material with a high specific surface area, is a potential candidate for gas sensors. Here, we report Au/SnO 2 composites with excellent performance synthesized by a chemical precipitation method based on CNF-assisted synthesis, and a series of Au/SnO 2 c...

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Bibliographic Details
Published in:Journal of electronic materials 2023-09, Vol.52 (9), p.5964-5974
Main Authors: Zhou, Xuebin, Ying, Zhihua, He, Xingxin, Zhang, Chenhan, Zheng, Xiaolong, Zheng, Peng
Format: Article
Language:English
Subjects:
Cellulose
Cellulose fibers
Characterization and Evaluation of Materials
Chemical precipitation
Chemical synthesis
Chemistry and Materials Science
Crystal structure
Electron microscopes
Electron microscopy
Electronics and Microelectronics
Gas sensors
Gold
Instrumentation
Materials Science
Microscopy
Nanofibers
Natural polymers
Nitrogen dioxide
Optical and Electronic Materials
Original Research Article
Particulate composites
Sensors
Solid State Physics
Tin dioxide
Ultraviolet radiation
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Summary:Cellulose nanofiber (CNF), a natural polymer material with a high specific surface area, is a potential candidate for gas sensors. Here, we report Au/SnO 2 composites with excellent performance synthesized by a chemical precipitation method based on CNF-assisted synthesis, and a series of Au/SnO 2 composites were prepared by adjusting the Au content. The sensitivity of the 1.5 wt.% Au/SnO 2 sensor to a low concentration of 1 ppm NO 2 was 53, nearly 17 times higher than that of pure SnO 2 synthesized by CNF, under ultraviolet (UV) irradiation at a wavelength of 365 nm. The crystal structure of the composite was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), revealing that the composites had high crystallinity and particles reaching the nanoscale. Further experimental data showed that the CNF-assisted synthesis Au/SnO 2 sensors had good selectivity, repeatability, and stability. Additionally, the sensor is able to maintain its excellent gas sensing performance even under varying humidity conditions.
ISSN:0361-5235
1543-186X
DOI:10.1007/s11664-023-10531-6